CN1103518A - Controllable current starter for winding-type motor - Google Patents
Controllable current starter for winding-type motor Download PDFInfo
- Publication number
- CN1103518A CN1103518A CN 93115939 CN93115939A CN1103518A CN 1103518 A CN1103518 A CN 1103518A CN 93115939 CN93115939 CN 93115939 CN 93115939 A CN93115939 A CN 93115939A CN 1103518 A CN1103518 A CN 1103518A
- Authority
- CN
- China
- Prior art keywords
- motor
- controllable silicon
- silicon
- resistance
- winding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Motor And Converter Starters (AREA)
Abstract
The starter for A.C. motor features that a group of antiparallel resistors controlled by SCRs are connected to rotor; a SCR trigger detects frequency of rotor voltage, that is, semi-period time of rotor voltage is measured in start procedure; and the start process of motor is controlled by regulating delay trigger time and turn-on time of SCR according to working characteristics of motor. Its advantages include hard start characteristic, big torque and high efficiency of motor.
Description
The invention belongs to moving electric motors, particularly controllable current starter for winding-type motor.
During conventional wound type AC motor starting, rotor must seal in additional resistance or reactance, with the mean value of restriction starting current, makes it to be no more than 2 times of rated current of each duty.But after additional resistance or reactance, the starting characteristic deliquescing of motor, or starting torque diminishes, and the motor utilance is descended.Be that starting characteristic is soft behind the motor rotor series resistor; Starting torque diminishes behind the string frequency sensitive trheostat, and stalling current is big, and the motor utilance reduces.
European patent EP 0446936A2 discloses a kind of motor controller with bypass contactor, is made up of three groups of three-phase inverse parallel controllable silicons that are connected on the stator three-phase, and adopts microcomputer and a bypass contactor to realize start-up control.U.S. Pat 4100469 disclosed mixed type motor starters are formed by being connected on the stator three groups of inverse parallel controllable silicons and corresponding contactor and an acceleration control circuit, solid-state control is subjected to quicken the control motorized motions, acceleration motor in start-up course, when reaching synchronizing speed, the operation contactor gets electric, its junction closure.Connect motor current, therefore when steady operation, solid-state control is a bypass.Utility model patent CN 2121771U and patent of invention CN 1055845A disclose AC asynchronous motor starting energy-saving appliance and modulating speed control startup method respectively.All these technology all are connected with the motor stator winding and realize controlling, and structure more complicated all.
The objective of the invention is to reach the restrictions motor starting current, to improve the purpose of motor torque and motor utilance by controlling the size of motor rotor electric current by thyristor controlled resistance normal connecting resistance of rotor serial connection and one.
According to the present invention, controllable current starter for winding-type motor is by being made up of with another controlling resistance that becomes with controllable silicon parallel resistor serial or parallel connection and relevant silicon controlled toggle a resistor of being connected in series mutually with motor rotor.Two antiparallel controllable silicons be in parallel or connect with another resistor again after a resistor is connected, again this serial or parallel connection resistance and motor rotor are in series, each of rotor all is connected in series such one group of string (also) connection resistance mutually, and a silicon controlled toggle is connected with each group inverse parallel controllable silicon respectively.
According to the present invention, detect the motor rotor electric voltage frequency by silicon controlled toggle, automatically follow the rotor voltage and the frequency of variation as synchronizing voltage with the rotor voltage frequency, the control silicon controlled angle of flow, utilize the current compensation rotor current of controllable silicon through resistor, improve the motor starting torque, reach desirable motor starting characteristic.
Because being the operating characteristic with motor, the frequency of motor rotor voltage changes, when motor speed approaches zero, and frequency f
2≈ 50Hz; When rotating speed approaches synchronous speed, frequency f
2≈ 0; When the motor plug braking, 50Hz＜f＜100Hz.
The used time of the every half period of motor rotor alternating voltage of working when different frequency is
t
2＝1/2f
2
In the formula, t
2: the time that the alternating voltage half period is used;
f
2: the motor rotor frequency.
T delays time after silicon controlled toggle detects motor rotor voltage
2Controllable silicon is triggered in ' back, makes it conducting.The silicon controlled trigger angle is to be subjected to rotor voltage every half period time t in starting process
2Controlled.And time-delay triggered time t
2' then be to adjust according to the required operating characteristic of motor.Adjust time-delay triggered time t
2' after, silicon controlled ON time t
2" also determined by following formula:
t
2″＝t
2-t
2′
Be controllable silicon ON time t
2" equal rotor alternating voltage half period time t
2Deduct time-delay triggered time t
2'.The silicon controlled pilot angle is determined by following formula:
a
2″＝（f
2/50）·α
2′
In the formula, α
2": the SCR control angle in the motor starting procedure;
α
2': silicon controlled pilot angle when frequency is 50Hz.
Because α
2'=t
2'/0.01 * 180=18000t
2'
α
2″＝360f
2·t
2′。
Only at rotor voltage half period time t
2Greater than time-delay triggered time t
2In ' time, silicon controlled toggle is just exported trigger impulse, therefore, and when the motor plug braking, just at 50Hz＜f
2During＜100Hz, controllable silicon is in off state.
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is a motor rotor control circuit of the present invention.
Fig. 2 is the silicon controlled toggle schematic diagram.
Fig. 3 is the motor starting characteristic curve.
Fig. 4～Fig. 6 is the various mode of connections of motor rotor control circuit.
As shown in Figure 1, winding-type motor controllable silicon starting device of the present invention is by three groups on the rotor that is concatenated into motor D three phase a, b, the c conventional series resistor R
a, R
b, R
cThyristor controlled resistance and silicon controlled toggle (Fig. 2) are formed, and SCR control resistance is by two antiparallel controllable silicons and the resistance R that is in series with it
A1, R
B1, R
C1Form.Normal connecting resistance R
a, R
b, R
cRespectively with inverse parallel controllable silicon and resistance R thereof
A1, R
B1, R
C1Be in parallel, these three groups of controlling resistances are star-like wiring.
The input of silicon controlled toggle T joins with three-phase a, b, the c of motor rotor respectively, output respectively with inverse parallel silicon controlled control utmost point G
Az, G
AF, G
DZ, G
DF, G
BZ, G
BFNegative electrode a
1, a, b
1, b, c
1, c is connected.
Motor D rotates, and silicon controlled toggle T detects the electric voltage frequency of motor D rotor each phase a, b, c, adjusts time-delay triggered time t according to the needed operating characteristic of motor
2', the ON time t of controllable silicon under the different frequency situation
2"=t
2-t
2'.Utilize the current compensation rotor current of controllable silicon, improve the starting torque of motor, improve electronic starting characteristic through resistor.
Fig. 3 has compared only with conventional series resistor R
a, R
b, R
cThe time motor starting characteristic curve I and use starting device of the present invention after motor starting characteristic curve II.Can obviously find out from Fig. 3, adopt controllable silicon starting device of the present invention after, starting characteristic is hard, starting torque increases, thereby has improved the motor utilance.
Fig. 4～Fig. 6 is other several embodiments of the present invention.
In control circuit shown in Figure 4, it connects method is with three groups of inverse parallel controllable silicons and resistance R
A1, R
B1, R
C1After the parallel connection again with conventional series resistor R
a, R
b, R
cBe in series.All the other methods of attachment are identical with embodiment shown in Figure 1.
In scheme shown in Figure 5, three groups of conventional resistance of SCR control resistance connect for the angle type, and all the other mode of connections are identical with scheme shown in Figure 1.
In scheme shown in Figure 6, three groups of conventional resistance of SCR control resistance are angle-type scheme, and all the other mode of connections are identical with scheme shown in Figure 4.
All these schemes can both obtain same effect.
Embodiment.
The controllable silicon starting device that is used for YZR225 * *-2 22kW motor.
Motor load torque M
2=0.8Me
Load factor FC=40%;
Number of starts: 300 times/h,
Rotor current
=45.6A;
Rotor open circuit voltage U
2=234v
Normal connecting resistance R
a=R
b=R
c=1.4 Ω, controllable resistor R
A1=R
B1=R
C1=0.8 Ω triggers electrical equipment delay time t
2'=0.01s.
Table 1 has been listed the value of each parameter in the starting process, and its characteristic curve as shown in Figure 3.The curve I is that motor only is connected in series a normal connecting resistance R
2Characteristic curve during=1 Ω, starting current I at this moment
2=
。The starting torque of curve II is big, and starting characteristic is hard, and the utilance of motor can be high more than 30%.
Wherein, S=f
2/ 50
I
2＝SU
2/
R
2
I
2′＝SU
2/
R
2′
I＝I
2+I
2′
Claims (6)
1, a kind of normal connecting resistance and three groups of inverse parallel silicon controlled winding-type motor controllable silicon starting devices of utilizing, it is characterized in that this device is made up of three groups of thyristor controlled resistance of inverse parallel and silicon controlled toggle T, said thyristor controlled resistance is connected in the motor rotor loop and by two antiparallel controllable silicons be attached thereto the controlling resistance R that connects
A1, R
B1, R
C1Form said normal connecting resistance R
a, R
b, R
cRespectively with inverse parallel controllable silicon and resistance R thereof
A1, R
B1, R
C1Be connected, these three groups of controlling resistances interconnect, and the input of said silicon controlled toggle joins with three-phase a, b, the c of motor rotor respectively, its output respectively with inverse parallel silicon controlled control utmost point G
AZ, G
AF, G
DZ, G
DF, G
CZ, G
CFWith negative electrode a
1, a, b
1, b, c
1, c is connected.
2, according to the winding-type motor controllable silicon starting device of claim 1, it is characterized in that respectively organizing inverse parallel controllable silicon and controlling resistance R
A1, R
B1, R
C1Be in series.
3, according to the winding-type motor controllable silicon starting device of claim 1, it is characterized in that respectively organizing inverse parallel controllable silicon and controlling resistance R
A1, R
B1, R
C1Be in series.
4, according to the electronic controllable silicon starting device of the winding-type of claim 1, it is characterized in that being connected on each SCR control circuit of going up mutually of motor rotor is star-like wiring.
5, according to the winding-type motor controllable silicon starting device of claim 1, it is characterized in that being connected on each SCR control circuit of going up mutually of motor rotor is angle-type scheme.
6, a kind of winding-type motor method for starting-controlling that adopts the controllable silicon starting device is characterized in that:
(1) detect the frequency of motor rotor voltage by silicon controlled toggle T,
(2) utilize the motor rotor electric voltage frequency to control thyristor operating angle automatically as trigger synchronizing voltage and control voltage,
(3) adjust silicon controlled time-delay triggered time t ' according to the needed operating characteristic of motor
2,
(4) get the ON time t of controllable silicon under the different frequency situation
2" equal the half period time t of rotor voltage in starting process
2Deduct controllable silicon delay time t '
2,
(5) determine silicon controlled pilot angle α by silicon controlled toggle T
2"=360f
2T
2'.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93115939A CN1039564C (en) | 1993-12-01 | 1993-12-01 | Controllable current starter for winding-type motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93115939A CN1039564C (en) | 1993-12-01 | 1993-12-01 | Controllable current starter for winding-type motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1103518A true CN1103518A (en) | 1995-06-07 |
| CN1039564C CN1039564C (en) | 1998-08-19 |
Family
ID=4991469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93115939A Expired - Fee Related CN1039564C (en) | 1993-12-01 | 1993-12-01 | Controllable current starter for winding-type motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1039564C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045011A (en) * | 2010-11-24 | 2011-05-04 | 沈阳工业大学 | Starting process optimization control device and method of wound rotor type permanent magnet motor |
| CN104022691A (en) * | 2013-11-30 | 2014-09-03 | 广西鱼峰集团水泥有限公司 | Liquid resistor starting device |
| CN109889123A (en) * | 2019-03-12 | 2019-06-14 | 洛阳理工学院 | The control system and control method of wound rotor asynchronous motor power-factor improvement |
-
1993
- 1993-12-01 CN CN93115939A patent/CN1039564C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045011A (en) * | 2010-11-24 | 2011-05-04 | 沈阳工业大学 | Starting process optimization control device and method of wound rotor type permanent magnet motor |
| CN104022691A (en) * | 2013-11-30 | 2014-09-03 | 广西鱼峰集团水泥有限公司 | Liquid resistor starting device |
| CN109889123A (en) * | 2019-03-12 | 2019-06-14 | 洛阳理工学院 | The control system and control method of wound rotor asynchronous motor power-factor improvement |
| CN109889123B (en) * | 2019-03-12 | 2024-04-02 | 洛阳理工学院 | Control system and control method for improving power factor of wound-rotor asynchronous motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1039564C (en) | 1998-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2036026A1 (en) | Electric motor controller with bypass contactor | |
| CN1889354A (en) | Wave hopping stage variable frequency stepless voltage regulating electric machine soft starting method | |
| CN1275254A (en) | Controller of AC generator for vehicle | |
| CN1039564C (en) | Controllable current starter for winding-type motor | |
| US6501244B2 (en) | Method and apparatus for controlling a high-speed AC permanent magnet synchronous motor coupled to an industrial turbo engine | |
| CN114553078A (en) | Three-phase six-beat control method for electro-magnetic doubly salient power generation system | |
| CN111245310B (en) | Asynchronous starting permanent magnet synchronous motor quick starting method based on torque characteristics | |
| CN1194463C (en) | Phase controller for AC motor | |
| CN101075796A (en) | Flexible starter for electric motor | |
| CN213342065U (en) | Motor rotating speed control circuit | |
| JP3044894B2 (en) | Windmill generator | |
| CN2125890U (en) | Induction motor speed governing device for electric vehicle | |
| CN2080262U (en) | Ac modulation speed adjusting, starting device | |
| CN2094540U (en) | Speed controller for lifting structure | |
| SU658687A1 (en) | Method of starting twin-motor asynchronous machine-power-diode cascade | |
| SU985912A1 (en) | Device for automatic control of induction motor in frequency braking mode | |
| JPH10507058A (en) | Dual mode controller for brushless DC motor | |
| CN2687936Y (en) | Direct-current motor and washing machine drived thereby | |
| CN1061121A (en) | The serial regulator device of diffierential thyristor inverter | |
| CN2236190Y (en) | Squireel-cage type d.c. speed-regulation electric motor | |
| CN2668040Y (en) | Vacuum oeaner governor | |
| CN1650510A (en) | Energy conversion apparatus with induction machine and method for operating the same | |
| CN2079831U (en) | Serial regulator for diffierential thyristor inverter | |
| Srinivasan et al. | A SOLID STATE RESISTANCE CONTROLLER FOR 3-PHASE SLIP-RING INDUCTION MOTOR | |
| SU1746504A1 (en) | Method of stepped frequency start of multimotor hysteresis electric drive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |